I've been PLAGUED with driver issues. When the cards work (which is a rarity) i've experienced 60+fps on enthusiast settings on Crysis and some very nice fps on full gfx settings on FFXIV.

However, the constant crashing of drivers, due to TDR (timeout driver recovery) events and blue screens of death due to ATIKMPAG.sys it has pretty much rendered my system unusable.

Every attempt at trying new drivers, even a system format has deemed fruitless and my only solution was to go back to my 5870 which is fully reliable. However, the reason for the upgrade was that it wasn't powerful enough, and so as such, i've moved back to NVIDIA.